Dalton, whose charges included six counts of premeditated murder, said he has been wanting this for a long time.

Joel Bissell/Kalamazoo Gazette via AP

Jason Dalton talks with his defense attorney Eusebio Solis moments before pleading guilty to six counts of murder and several other charges at the Kalamazoo County Courthouse on Monday, Jan. 7, 2019 in Kalamazoo, Mich.

Kalamazoo County prosecutor Jeff Getting said it's unusual to make a guilty plea to first-degree murder because the consequence is mandatory life in prison.

As a result of the plea, Dalton will serve a life sentence without the possibility of parole.